[PREVIEW ONLY] Change default to SWDMv4

Author: fershad

CHANGELOG.md

@@ -21,6 +21,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Released
 
+### [0.17.0] - 2025-12-02
+
+#### Changes
+* Add `data` and `hosting` subpath exports
+* Add warning about switching default model to SWDMv4
+
+#### Security
+* Bump tar-fs from 2.1.3 to 2.1.4 by @dependabot[bot] in https://github.com/thegreenwebfoundation/co2.js/pull/265
+* Bump js-yaml by @dependabot[bot] in https://github.com/thegreenwebfoundation/co2.js/pull/268
+
 ### [0.16.8] - 2025-05-12
 
 #### Fixed

dist/iife/index.js

@@ -1,6 +1,6 @@
 {
   "name": "@tgwf/co2",
-  "version": "0.16.9",
+  "version": "0.17.0",
   "description": "Work out the co2 of your digital services",
   "main": "dist/cjs/index-node.js",
   "module": "dist/esm/index.js",

package-lock.json

@@ -70,27 +70,26 @@ import {
 
 class CO2 {
   constructor(options) {
-    this.model = new SustainableWebDesignV3();
+    this.model = new SustainableWebDesignV4();
     // Using optional chaining allows an empty object to be passed
     // in without breaking the code.
     if (options?.model === "1byte") {
       this.model = new OneByte();
     } else if (options?.model === "swd") {
-      this.model = new SustainableWebDesignV3();
-      if (options?.version === 4) {
+      this.model = new SustainableWebDesignV4();
+      if (options?.version === 3) {
+        this.model = new SustainableWebDesignV3();
+      } else if (options?.version === 4) {
         this.model = new SustainableWebDesignV4();
       }
-    } else if (!options?.model) {
-      console.warn(`------
-WARNING: We are changing the default estimation model in CO2.js to Sustainable Web Design v4 in the next version (v0.18) of CO2.js. This change will take place in February 2026.
-
-If you would like to keep using Sustainable Web Design v3, please make sure to explicitly set it in your code. See https://developers.thegreenwebfoundation.org/co2js/models/#using-sustainable-web-design-model-version-3 for details.
-------
-  `);
     } else if (options?.model) {
       throw new Error(
         `"${options.model}" is not a valid model. Please use "1byte" for the OneByte model, and "swd" for the Sustainable Web Design model.\nSee https://developers.thegreenwebfoundation.org/co2js/models/ to learn more about the models available in CO2.js.`
       );
+    } else if (!options?.model && options?.version) {
+      throw new Error(
+        `"Specified version ${options?.version} but an estimation model is missing. Please specify a model to use for the version you have set.`
+      );
     }
 
     if (options?.rating && typeof options.rating !== "boolean") {